/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hive.serde2.objectinspector.primitive;

import org.apache.hadoop.hive.serde2.io.HiveVarcharWritable;
import org.apache.hadoop.hive.serde2.objectinspector.ConstantObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.VarcharTypeParams;

/**
 * A WritableConstantHiveVarcharObjectInspector is a WritableHiveVarcharObjectInspector
 * that implements ConstantObjectInspector.
 */
public class WritableConstantHiveVarcharObjectInspector extends
    WritableHiveVarcharObjectInspector implements
    ConstantObjectInspector {

  protected HiveVarcharWritable value;

  WritableConstantHiveVarcharObjectInspector(HiveVarcharWritable value) {
    this(value, null);
  }

  WritableConstantHiveVarcharObjectInspector(HiveVarcharWritable value,
      VarcharTypeParams typeParams) {
    super(PrimitiveObjectInspectorUtils.varcharTypeEntry);
    this.value = value;

    // If we have been provided with type params, then use them.
    // Otherwise determine character length and update type params/typeinfo accordingly.
    if (typeParams == null) {
      typeParams = new VarcharTypeParams();
      typeParams.length = this.value.getCharacterLength();
    }
    setTypeParams(typeParams);
    this.typeEntry = PrimitiveObjectInspectorUtils.getTypeEntryFromTypeSpecs(
        PrimitiveCategory.VARCHAR,
        typeParams);
  }

  @Override
  public HiveVarcharWritable getWritableConstantValue() {
    return value;
  }
}
